If you like a girl, do you always want to spend time with her?

No, swarming all over a girl is a major boo boo, makes you look sad & desperate.
Relax, be yourself & let them come to you.

I find I always want to spent time with everything I like.

Play hard to get (;

Don’t play hard to get, but don’t smother them either.

No, you can like someone without having to spend every single minute with them. In fact, you will probably get along better if you do not.

I’m a very introverted guy so I prefer more private time than most others I know. I do feel that some space is important.

Do you talk to her a lot? – You talk to her enough. If the conversation keeps flowing, why end it?

If you just met her, do you message her instantly after? – I’m not a big fan of ‘game playing’. If it seems like you’re messaging her more than she’s messaging you or vice versa, then perhaps you have what evidence you need to come to the right conclusion.

Do you want to stay longer in a place because she it there? – Yes and no. Certainly stick around the places she’s hanging around, if you’re interested in seeing where she likes to be and getting to know her. There also comes a time when you need to pick the time and the place – and see if she’s into it.